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-rw-r--r--tests/qtgui/reference_count_test.py71
1 files changed, 71 insertions, 0 deletions
diff --git a/tests/qtgui/reference_count_test.py b/tests/qtgui/reference_count_test.py
new file mode 100644
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+++ b/tests/qtgui/reference_count_test.py
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+
+'''Test cases for Reference count when the object is created in c++ side'''
+
+import unittest
+
+import sys
+import weakref
+import gc
+
+
+from PySide.QtCore import Qt, QPointF
+from PySide.QtGui import QApplication, QGraphicsScene, QGraphicsRectItem, QPolygonF, QGraphicsPolygonItem, QGraphicsRectItem
+
+from helper import UsesQApplication
+
+destroyedRect = False
+destroyedPol = False
+
+def rect_del(o):
+ global destroyedRect
+ destroyedRect = True
+
+def pol_del(o):
+ global destroyedPol
+ destroyedPol = True
+
+class ReferenceCount(UsesQApplication):
+
+ def setUp(self):
+ super(ReferenceCount, self).setUp()
+ self.scene = QGraphicsScene()
+
+ def tearDown(self):
+ super(ReferenceCount, self).tearDown()
+
+ def beforeTest(self):
+ points = [QPointF(0, 0), QPointF(100, 100), QPointF(0, 100)]
+ pol = self.scene.addPolygon(QPolygonF(points))
+ self.assert_(isinstance(pol, QGraphicsPolygonItem))
+ self.wrp = weakref.ref(pol, pol_del)
+
+ #refcount need be 3 because one ref for QGraphicsScene, and one to rect obj
+ self.assertEqual(sys.getrefcount(pol), 3)
+
+ def testReferenceCount(self):
+ global destroyedRect
+ global destroyedPol
+
+ self.beforeTest()
+
+ rect = self.scene.addRect(10.0, 10.0, 10.0, 10.0)
+ self.assert_(isinstance(rect, QGraphicsRectItem))
+
+ self.wrr = weakref.ref(rect, rect_del)
+
+ #refcount need be 3 because one ref for QGraphicsScene, and one to rect obj
+ self.assertEqual(sys.getrefcount(rect), 3)
+
+ del rect
+ #not destroyed because one ref continue in QGraphicsScene
+ self.assertEqual(destroyedRect, False)
+ self.assertEqual(destroyedPol, False)
+
+ del self.scene
+
+ #QGraphicsScene was destroyed and this destroy internal ref to rect
+ self.assertEqual(destroyedRect, True)
+ self.assertEqual(destroyedPol, True)
+
+if __name__ == '__main__':
+ unittest.main()